TY - BOOK AU - Howson,A.G. ED - International Congress on Mathematical Education, TI - Developments in mathematical education : : proceedings of the secon d International Congress on Mathematical Education / SN - 052120190X. U1 - 510.71 PY - 1973/// CY - Cambridge : PB - Cambridge University Press, KW - Mathematics KW - Study and teaching KW - Congresses N1 - Includes bibliographical references and index ER -